1 files changed, 34 insertions, 8 deletions

diff --git a/subex/filter.go b/subex/filter.go
index 1a1b6db..309d6c7 100644
--- a/subex/filter.go
+++ b/subex/filter.go
@@ -17,16 +17,36 @@ func (scalar selectScalarFilter) valueFilter(value walk.Value) bool {
 
 type anyNumberFilter struct {}
 func (_ anyNumberFilter) valueFilter(value walk.Value) bool {
-	_, isNumber := value.(walk.NumberScalar)
+	_, isNumber := value.(walk.NumberValue)
 	return isNumber
 }
 
 type anyBoolFilter struct {}
 func (_ anyBoolFilter) valueFilter(value walk.Value) bool {
-	_, isBool := value.(walk.BoolScalar)
+	_, isBool := value.(walk.BoolValue)
 	return isBool
 }
 
+type simpleValueFilter struct {}
+func (_ simpleValueFilter) valueFilter(value walk.Value) bool {
+	switch value := value.(type) {
+	case walk.NullValue:
+		return true
+	case walk.BoolValue:
+		return true
+	case walk.NumberValue:
+		return true
+	case walk.StringValue:
+		return true
+	case walk.ArrayValue:
+		return len(value) == 0
+	case walk.MapValue:
+		return len(value) == 0
+	default:
+		panic("Invalid value type")
+	}
+}
+
 type anyValueFilter struct {}
 func (_ anyValueFilter) valueFilter(value walk.Value) bool {
 	return true
@@ -34,29 +54,35 @@ func (_ anyValueFilter) valueFilter(value walk.Value) bool {
 
 type anyArrayFilter struct {}
 func (_ anyArrayFilter) valueFilter(value walk.Value) bool {
-	_, isArray := value.(walk.ArrayStructure)
+	_, isArray := value.(walk.ArrayValue)
 	return isArray
 }
 
+type anyMapFilter struct {}
+func (_ anyMapFilter) valueFilter(value walk.Value) bool {
+	_, isMap := value.(walk.MapValue)
+	return isMap
+}
+
 type anyStringFilter struct {}
 func (_ anyStringFilter) valueFilter(value walk.Value) bool {
-	_, isString := value.(walk.StringStructure)
+	_, isString := value.(walk.StringValue)
 	return isString
 }
 
 
 type runeFilter interface {
-	runeFilter(r walk.StringRuneAtom) bool
+	runeFilter(r rune) bool
 }
 
 type anyRuneFilter struct {}
-func (_ anyRuneFilter) runeFilter(r walk.StringRuneAtom) bool {
+func (_ anyRuneFilter) runeFilter(r rune) bool {
 	return true
 }
 
 type selectRuneFilter struct {
 	r rune
 }
-func (f selectRuneFilter) runeFilter(r walk.StringRuneAtom) bool {
-	return f.r == rune(r)
+func (f selectRuneFilter) runeFilter(r rune) bool {
+	return f.r == r
 }